Basing on materials of complex investigation on the territory of archeological monument #Nishnaya Kayancha# the results of soil phytolite analysis of burial mound and inter-barrow space are presented. Also the samples from the berried level and soil from inside of the burial mound have been investigated. In addition the geobotanical description of the territory has been made. The main result is determination of the moment when the forest was cut down (before burial mound was made) and the fact of the high antropogenic pressure on that territory.

Key words: рhytolite, phytolite analysis, morphotypes, archeological objects, vegetation reconstruction.